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Technical Products Quality Control

The quality control department carries out a series of quality tests for paper, cardboard and even for the glue used in production to ensure that the client receives the expected product at each order. Test can also be conducted on packages used by potential clients to make recommendations regarding the used material.

The following tests are performed in our labs:

ECT (Edge Crush Test), resistance to crushing on the edge of corrugated cardboard, a test performed daily for each manufactured type of corrugated cardboard. It is one of the most important tests because there is a direct correspondence between this rating and BCT (box compression test).

BCT (Box Compression Test), resistance to compression, the most important test for the finished product (box), provides data regarding the ideal weight, load and palletizing at the client.

FCT and CMT (Flat Crush of Corrugating Medium) are important for the flute resistance calculus and in the final structure of the corrugated cardboard as well. It is a useful test to define optimal conditions for loading in boxes, transport, lateral perforation of packaging especially when packing fragile products (furniture, glass, artwork, etc.)

The determination of wetness of the paper and the starch by drying is conducted in the lab's drying closet by measuring weight and evaluating differences before and after drying. We use the same procedure to determine the dry substance content in starch glue, essential data for the right glue preparation and to obtain a resistant and quality compliant corrugated cardboard.

The Cobb number offers important information regarding each type of top linerboard’s capacity to absorb water which is essential for clients who market frozen or refrigerated products or products transported in high humidity conditions.

Resistance to crushing, is performed on corrugated cardboard and on top linerboard and is important for packaging with risk of perforation during handling or transport.

Corrugated cardboard and paper thickness is determined by thickness gauge or micrometer and is an important parameter for the final product’s resistance beside the quality of paper used during production. It is a parameter that depends on the paper thickness, the glue layer applied, cardboard type and flute type.

The weighing (grams/square meter) of paper is performed on analytical balance with pre-cut samples and represents an important parameter for the pallet load. In later years the tendency has been to use of lighter paper types while keeping the quality parameters for economical and environmental reasons.

It is very important that all the test in the QC labs are performed under controlled climate (23±1ºC temperature and 50±2% humidity compliant with SR EN 20187/1997).